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Finding the Fourth Proportional to 68,490.56, 102,694.84 and 28,461.27

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Solution

The fourth proportional to 68,490.56, 102,694.84 and 28,461.27 is: 42,674.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,490.56 : 102,694.84 = 28,461.27 : x
  2. Step 2: Convert to fraction form
    68,490.56/102,694.84 = 28,461.27/x
  3. Step 3: Cross multiply
    68,490.56x = 102,694.84 × 28,461.27
  4. Step 4: Simplify right side
    68,490.56x = 2,922,825,882.80
  5. Step 5: Solve for x
    x = 2,922,825,882.80/68,490.56
  6. Step 6: Final answer
    x = 42,674.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.